import axios from "axios";
import { Notification, MessageBox, Message, Loading } from "element-ui";
import store from "@/store";
import { getToken } from "@/utils/auth";
import errorCode from "@/utils/errorCode";
import { tansParams, blobValidate } from "@/utils/ruoyi";
import cache from "@/plugins/cache";
import { saveAs } from "file-saver";

let downloadLoadingInstance;
// 是否显示重新登录
export let isRelogin = { show: false };

axios.defaults.headers["Content-Type"] = "application/json;charset=utf-8";
// 创建axios实例
function createInstance() {
  const instance = axios.create({
    baseURL: process.env.VUE_APP_BASE_API,
    // 超时
    timeout: 10000,
  });

  // request拦截器
  instance.interceptors.request.use(
    (config) => {
      // 是否需要设置 token
      const isToken = (config.headers || {}).isToken === false;
      // 是否需要防止数据重复提交
      const isRepeatSubmit = (config.headers || {}).repeatSubmit === false;
      if (getToken() && !isToken) {
        config.headers["Authorization"] = getToken(); // 让每个请求携带自定义token 请根据实际情况自行修改
      }
      // get请求映射params参数
      if (config.method === "get" && config.params) {
        let url = config.url + "?" + tansParams(config.params);
        url = url.slice(0, -1);
        config.params = {};
        config.url = url;
      }
      if (
        !isRepeatSubmit &&
        (config.method === "post" || config.method === "put")
      ) {
        const requestObj = {
          url: config.url,
          data:
            typeof config.data === "object"
              ? JSON.stringify(config.data)
              : config.data,
          time: new Date().getTime(),
        };
        const sessionObj = cache.session.getJSON("sessionObj");
        if (
          sessionObj === undefined ||
          sessionObj === null ||
          sessionObj === ""
        ) {
          cache.session.setJSON("sessionObj", requestObj);
        } else {
          const s_url = sessionObj.url; // 请求地址
          const s_data = sessionObj.data; // 请求数据
          const s_time = sessionObj.time; // 请求时间
          const interval = 1000; // 间隔时间(ms)，小于此时间视为重复提交
          if (
            s_data === requestObj.data &&
            requestObj.time - s_time < interval &&
            s_url === requestObj.url
          ) {
            const message = "数据正在处理，请勿重复提交";
            console.warn(`[${s_url}]: ` + message);
            return Promise.reject(new Error(message));
          } else {
            cache.session.setJSON("sessionObj", requestObj);
          }
        }
      }
      return config;
    },
    (error) => {
      console.log(error);
      Promise.reject(error);
    }
  );

  // 响应拦截器
  instance.interceptors.response.use(
    (res) => {
      const {
        config: { headers },
      } = res;
      // 未设置状态码则默认成功状态
      const code = res.data.code || 200;
      // 获取错误信息
      const msg = errorCode[code] || res.data.msg || errorCode["default"];
      // 二进制数据则直接返回
      if (
        res.request.responseType === "blob" ||
        res.request.responseType === "arraybuffer"
      ) {
        return res.data;
      }

      // console.log('res', res)
      if (code === 401) {
        if (!isRelogin.show) {
          isRelogin.show = true;
          console.log(111, headers);
          if (headers.isNeedToken === false) {
            return res.data;
          }
          MessageBox.confirm(
            "登录状态已过期，您可以继续留在该页面，或者重新登录",
            "系统提示",
            {
              confirmButtonText: "重新登录",
              cancelButtonText: "取消",
              type: "warning",
            }
          )
            .then(() => {
              isRelogin.show = false;
              store.dispatch("LogOut").then(() => {
                location.href = "/index";
              });
            })
            .catch(() => {
              isRelogin.show = false;
            });
        }
        return Promise.reject("无效的会话，或者会话已过期，请重新登录。");
      } else if (code === 500) {
        if (headers.showErrorMsg !== false) {
          Message({
            message: msg,
            type: "error",
          });
        }
        return Promise.reject(new Error(msg));
      } else if (code !== 200) {
        if (headers.showErrorMsg !== false) {
          Notification.error({
            title: msg,
          });
        }
        return Promise.reject("error");
      } else {
        return res.data;
      }
    },
    (error) => {
      console.log("err" + error);
      let { message } = error;
      if (message == "Network Error") {
        message = "后端接口连接异常";
      } else if (message.includes("timeout")) {
        message = "系统接口请求超时";
      } else if (message.includes("Request failed with status code")) {
        message = "系统接口" + message.substr(message.length - 3) + "异常";
      }
      Message({
        message: message,
        type: "error",
        duration: 5 * 1000,
      });
      return Promise.reject(error);
    }
  );
  return instance;
}

// 通用下载方法
export function download(url, params, filename) {
  downloadLoadingInstance = Loading.service({
    text: "正在下载数据，请稍候",
    spinner: "el-icon-loading",
    background: "rgba(0, 0, 0, 0.7)",
  });
  return service
    .post(url, params, {
      transformRequest: [
        (params) => {
          return tansParams(params);
        },
      ],
      headers: { "Content-Type": "application/x-www-form-urlencoded" },
      responseType: "blob",
    })
    .then(async (data) => {
      const isLogin = await blobValidate(data);
      if (isLogin) {
        const blob = new Blob([data]);
        saveAs(blob, filename);
      } else {
        const resText = await data.text();
        const rspObj = JSON.parse(resText);
        const errMsg =
          errorCode[rspObj.code] || rspObj.msg || errorCode["default"];
        Message.error(errMsg);
      }
      downloadLoadingInstance.close();
    })
    .catch((r) => {
      console.error(r);
      Message.error("下载文件出现错误，请联系管理员！");
      downloadLoadingInstance.close();
    });
}

let service = createInstance();
export default service;
